Years ago I had a great book on WWI sitting out and a friend saw it and commented, "I thought WWI was the boring war and WWII was the more exciting one." I replied, WWII had some great villains and technology, but WWI had elements that stand out to me too. It certainly wasn't boring, but I can see why its overshadowed by WWII."
When I first started reading about WWII, and this was when I was literally the 3rd thing I got into when I was a little kid after dinosaurs and star wars, I focused on the tanks and airplanes, and the battles. It took me many years to realize that the most interesting thing about the war was not the technology and battles, but the politics and economics behind the war that drove the technology and battles. I feel the same about WWI.
In Dan Carlin's coverage of the war, he called Gavrilo Princip one of the most influential people of the 20th century, and I agree with him. He might be THE most influential. He set in motion WWI, which set in motion WWII years later, which in turn set in motion the Cold War, which in turn the rise of terrorism, and the environment we all grew up in.